Improvement in locks for handcuffs



waited A geniet @anni @time JAMES A.v WISNER AND MONSON HQYT, OF EAST SAGlNAW, MICHIGAN.

Letters PatentNo. 92,414, dated July 6, 1869.

IMPROVEMENT IN LOCKS FOR HANDCUFPS.

The Schedule referred to in these Letters vPatent and making part of the same.

To all wheat/Zt 'may concern Be it known that we, J AMES A. WrsNER, and MoN- soN HOYT, of' the city of East Saginaw, in the county of Saginaw, andthe State of Michigan, have invented a new and improved Mode of Construct-ing Handcuffs and Shackles; and we do hereby declare-that the following is a full and exact description thereof', reference being had to the accompanying drawings, and the letters of reference marked thereon.

'lhe nature of our invention consists of' a doubleacting lockf'or handcuffs and shackles, containing a conical bolt, worked by means of a screw on its inner end, two catch-springs, working laterally into notches on both sides ofthe adjustable curved arm or slide which f'orins a main part of' the instrument, and two bars, operated on by the screw-bol t, to throw them out, and open the lock, by pressing back the catch-springs.

To enable others skilled in the art to make and use our invention, we proceed to describe its construction and operation.

We constructeur handcuffs and shackles of malleable iron, steel, or any other suitable metal, and in such form, that when closed they are as near the slope of the limbs they are designed for as they can be made.'

lhe connection between the pair of instruments consists oi" a swivel, attached to the ringf, at the joint of' each, thus throwingthe lock on the outside, and placing it in such a position with the key-hole c, on the underside, that the wearercannot reach the key-hole to unlock it. i

Figure l, in the accon'ipanying drawings, shows the instrument when open and ready f'or use; also, the notches on the sides of` the adjustable. arm A; Y

Figure 2 shows it when closed, and held by the catch-springs;

Figure 7 shows the lock clos'ed, with the position of the screw-bolt lb after the pressure has been removed from the barsc, and the bars withdrawn;

Figure S shows the position of the catch-springs d when the lock is closed, and when open, by the dotted lines;- and Figure 9 is au end view of' the key. l

It should be observed that the two sections or arms A B of the handcuff must be so formed as tot the limbs on which they may be used, and at the same time the joint or hingey must be so placed between them that the notched arm A will move readily and evenly through the lock;

Having described the nature of our invention, and its construction and operation, we declare that ywhat we claimv as our invention, and -desire to secure by Letters Patent, is-

The combination and arrangement of' the conical screw-bolt b, bars e, catch-springs tl, and notched arm A, all constructed and operated substantially as and for the purposeset forth. JAMES A. VISNER.

MON SON HOYT.

Witnesses:

WM. S. Darcos, Faun. A. ASHLEY. 

